CN117505591A - Hot bending and cold leveling straightening equipment and method for metal layered composite board - Google Patents
Hot bending and cold leveling straightening equipment and method for metal layered composite board Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 145
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 110
- 239000002184 metal Substances 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000013003 hot bending Methods 0.000 title claims abstract description 39
- 238000005452 bending Methods 0.000 claims abstract description 25
- 230000008569 process Effects 0.000 claims abstract description 23
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000003825 pressing Methods 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims description 18
- 239000007769 metal material Substances 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 9
- 230000036314 physical performance Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 28
- 239000010959 steel Substances 0.000 description 28
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 26
- 239000010936 titanium Substances 0.000 description 26
- 229910052719 titanium Inorganic materials 0.000 description 26
- 239000010410 layer Substances 0.000 description 14
- 229910000861 Mg alloy Inorganic materials 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
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Abstract
The invention discloses a hot bending and cold leveling straightening device and method for a metal layered composite board, and belongs to the technical field of metal layered composite boards. The device comprises a straightening roller, a driving device and a pressing device, wherein the straightening roller consists of at least one group of straightening concave rollers and straightening convex rollers with specific curvatures, the driving device is used for adjusting the straightening speed of the straightening roller, and the pressing device is used for adjusting the roll gap spacing of the straightening roller. And bending and deforming the metal laminated composite board with a certain temperature through hot bending and cold straightening equipment, and obtaining the flat metal laminated composite board in the subsequent cooling process. The hot bending and cold leveling straightening equipment for the metal layered composite board has the advantages of simple structure, high straightening efficiency and small deformation resistance, the surface quality of the metal layered composite board straightened by the method is good, the interface bonding quality of the metal layered composite board is less influenced in the straightening process, and the equipment is particularly suitable for online straightening of the hot-formed metal layered composite board.
Description
Technical Field
The invention belongs to the technical field of metal layered composite boards, and particularly relates to a hot bending and cold leveling straightening device and method for a metal layered composite board, which are particularly suitable for online straightening of a hot-working formed metal layered composite board.
Background
The metal layered composite board is formed by compounding two or more heterogeneous component metal materials, has the excellent performance of each component metal material, and is widely applied to the fields of aerospace, transportation, petrochemical industry, information communication, national defense and military industry, daily life and the like. Because the thermal expansion coefficients of different heterogeneous component metal materials in the metal layered composite board are different, the flat metal layered composite board obtained through thermal processing deformation is easy to bend and deform in the subsequent cooling process. As the processing temperature is higher or the thermal expansion coefficient of heterogeneous component metal materials is different, the bending deformation amplitude of the metal lamellar composite plate is larger, and the subsequent processing and application are seriously affected. Therefore, straightening of the bent metal laminate composite sheet is generally required before subsequent processing and application.
Currently, metal layered composite boards are mainly straightened by a pressure straightener, a stretch straightener or a roll straightener. When the pressure straightener is used for straightening, the bending part of the metal laminated composite plate is placed between the movable pressure head and the two fixed fulcrums, and the straightening is carried out by a one-time reverse bending strong elastoplastic deformation method, so that the method has the problems of complex operation, difficult control of reverse bending amount, low straightening efficiency, poor quality of the surface after straightening, difficult mass processing and the like; when the stretching straightener is adopted for straightening, tension exceeding the yield limit of the material is applied to the two ends of the metal layered composite board, so that the metal layered composite board is straightened by elastoplastic deformation; when the roller straightener is used for straightening, the metal layered composite board passes through the straightening rollers which are arranged in a staggered way, and the metal layered composite board is straightened by repeated bending elastoplastic deformation for many times, so that the thinner the metal layered composite board is, the more the straightening rollers are needed, and the problems that the equipment requirement is high, the reverse bending straightening force is large, the surface is easy to produce correction marks, the influence of repeated bending deformation on the composite interface quality of the metal layered composite board is large and the like exist.
As can be seen from the above, in the conventional straightening technology, the bent portion of the metal layered composite board is usually subjected to reverse bending or stretching by offline, so that the bent portion is subjected to certain elastoplastic deformation, and after the external force is removed, the metal layered composite board is elastically restored to a flat state. In the straightening process of the metal laminated composite board, not only is larger deformation corrective force applied to the metal laminated composite board, but also the uncooled deformation among the component metal material layers is easy to damage the bonding quality of interfaces, and especially in the multi-roller straightening repeated bending deformation process, the cracking of the composite interface is easy to be caused, so that the metal laminated composite board cannot be used. Therefore, development of new equipment and new method for straightening the metal layered composite plate is urgently needed to realize high-quality, high-efficiency, low-cost and continuous straightening processing of the metal layered composite plate, and especially to be helpful for realizing on-line straightening of the metal layered composite plate immediately after hot working and forming. The development of the straightening equipment and the straightening method can accelerate the popularization and application of the metal layered composite board, and has very important significance.
Disclosure of Invention
Aiming at the problems that the metal laminated composite board deforms in the preparation process or after cooling, so that the metal laminated composite board cannot be processed later or directly applied, the invention aims to provide the equipment and the method for straightening the metal laminated composite board by hot bending and cold leveling. The metal laminated composite board with certain temperature is bent, elastoplastically deformed by hot bending and cold leveling straightening equipment, and the deformed metal laminated composite board naturally reaches to be straight in the subsequent cooling process. Compared with the traditional pressure straightener, stretching straightener or roller straightener, the hot bending and cold leveling straightener has the advantages of simple equipment structure, high straightening efficiency, small deformation resistance and the like, and the metal layered composite board straightened by the method has good surface quality and small influence on interface bonding quality of the metal layered composite board in the straightening process, and is particularly suitable for online straightening of hot-working forming metal layered composite boards.
According to a first aspect of the technical scheme of the invention, a metal layered composite board hot bending and cold leveling device is provided, which comprises a leveling roller, a driving device, a pressing device, a rack and a transmission shaft;
the straightening roller comprises at least one group of straightening concave rollers and straightening convex rollers with specific curvatures, the straightening concave rollers and the straightening convex rollers are arranged in the middle of the frame, and the straightening concave rollers and the straightening convex rollers are connected with the transmission shaft;
the driving device is arranged on the side surface of the straightening roller and connected with the transmission shaft, and is used for driving the straightening roller and adjusting the straightening speed of the straightening roller;
the pressing device is arranged at the upper end of the frame and used for adjusting the roll gap spacing of the straightening roll.
Furthermore, the straightening rollers can be composed of a plurality of groups of straightening concave rollers and straightening convex rollers, wherein each group of straightening concave rollers and each group of straightening convex rollers are distributed in an up-down axisymmetric mode and are in one-to-one correspondence, the plurality of groups of straightening concave rollers are horizontally arranged on the same side, and the plurality of groups of straightening convex rollers are horizontally arranged on the other side.
Further, according to the thermal expansion coefficient of each component metal material in the metal layered composite board, the component metal material layers with large thermal expansion coefficients in the metal layered composite board are divided into base layers, and the component metal material layers with small thermal expansion coefficients are divided into cladding layers; the thermal expansion coefficient of the base layer is alpha 1 The thermal expansion coefficient of the coating is alpha 2 ，α 1 Greater than alpha 2 The method comprises the steps of carrying out a first treatment on the surface of the The total thickness of the metal laminated composite board is H.
Further, the straightening temperature of the metal layered composite board is T, and the application environment temperature is T 0 The difference between the straightening temperature and the application environment temperature is denoted by Δt, yielding Δt=t-T 0 The method comprises the steps of carrying out a first treatment on the surface of the The yield strength of the metal laminar composite board is sigma when the temperature is the straightening temperature T s The elastic modulus is E.
Further, the roll curve shape of the straightening roll is represented by the curvature K, which is k=2× (α 1 -α 2 )×ΔT/H+4×σ s /(E.times.H); the curvature is used for describing the geometric shape of the straightening roller, curvature setting is carried out according to the physical performance parameters of the metal lamellar composite material, and the metal lamellar composite material can be precisely bent and deformed, so that the metal lamellar composite material with flatness and high quality can be ensured to be obtained in the subsequent cooling process.
Further, the roll gap distance of the straightening roll is H.
Further, according to the actual situation of the metal layered composite plate, the curvature of the straightening roller and the roll gap spacing of the straightening roller can be adjusted.
Further, the straightening concave roller and the straightening convex roller are axisymmetric, and the installation positions of the straightening concave roller and the straightening convex roller are interchangeable.
Furthermore, the hot bending and cold leveling equipment for the metal layered composite plate can be combined with at least one leveling equipment of a pressure leveling machine, a stretching leveling machine or a roller leveling machine.
Further, the straightening device can be used as a rolling device for simultaneously rolling plastic deformation and straightening processing.
According to a second aspect of the technical scheme of the invention, a hot-bending and cold-leveling straightening method for a metal layered composite board is provided, wherein the straightening method for the metal layered composite board adopts the hot-bending and cold-leveling straightening equipment for the metal layered composite board according to any one of the above aspects to finish straightening, and comprises the following specific steps:
step 1: determining the application environment temperature T according to the actual application condition of the metal layered composite board 0 Calculating the difference DeltaT=T-T between the straightening temperature T and the straightening temperature T 0 The method comprises the steps of carrying out a first treatment on the surface of the Determining the physical performance parameters of the metal laminated composite board, and determining the thermal expansion coefficient alpha of the base layer 1 Coefficient of thermal expansion alpha of the coating 2 The total thickness H; determining the yield strength sigma of the metal laminate composite plate at a temperature which is the straightening temperature T s Modulus of elasticity E;
step 2: calculating the curvature k=2× (α of the straightening roll 1 -α 2 )×ΔT/H+4×σ s /(E×H)；
Step 3: processing the straightening roller with the curvature of K;
step 4: the straightening rollers are installed, and the gap distance between the rollers is adjusted to be H through the pressing device;
step 5: starting the driving device and adjusting the straightening speed;
step 6: carrying out thermal bending deformation on the metal layered composite board with the temperature T through the straightening roller with the curvature K, wherein the coating faces the straightening convex roller in the deformation process, and the base layer faces the straightening concave roller;
step 7: and cooling the metal laminated composite board after the thermal bending deformation to the application environment temperature to obtain the flat metal laminated composite board.
The invention has the main advantages that:
(1) The straightening equipment disclosed by the invention has the advantages of simple structure, high straightening efficiency, small deformation resistance and good surface quality of the straightened metal layered composite board, and can finish online continuous batch industrial hot straightening processing of the metal layered composite board by only one group of straightening rollers, so that the adverse effects of repeated bending deformation on the surface quality of the metal layered composite board and the bonding quality of a composite interface in the traditional multi-roller straightening process are obviously reduced.
(2) The straightening equipment combines the straightening technology with the rolling technology, achieves the purposes of rolling forming and straightening in one pass, and is particularly suitable for integrated synchronous rolling straightening processing of the hot-rolled plastic deformation metal layered composite plate.
(3) The straightening method combines thermal deformation processing and straightening, can directly perform thermal bending and cold leveling straightening by utilizing the waste heat after thermal deformation processing, does not need to perform secondary heating on the metal layered composite board and then straightens, improves the production efficiency and reduces the energy consumption.
(4) The straightening method can straighten the metal layered composite board to different degrees according to different application environment temperatures, and obtain the flat high-quality metal layered composite board which is used at the application environment temperature.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a hot bending and cold leveling device for a metal layered composite plate. Wherein, 1-straightening concave roller, 2-straightening convex roller, 3-driving device, 4-pressing device, 5-frame, 6-transmission shaft.
Fig. 2 is a schematic diagram of a hot bending and cold leveling process of the metal layered composite plate.
Fig. 3 is a physical diagram showing the curvature of the composite plate along with the temperature change in the cooling process after the pure titanium/Q235 steel layered composite plate is subjected to thermal bending deformation.
Detailed Description
The present invention is described in detail below with reference to examples, which are given for further illustration of the present invention only, and should not be construed as limiting the scope of the present invention, since various modifications and adjustments may be made by those skilled in the art in light of the present disclosure.
In order to make the above objects, features and advantages of the present invention more comprehensible, the following technical solutions of the present invention are described in detail with reference to the accompanying drawings and detailed description.
The technical scheme of the invention firstly provides a metal layered composite board hot bending and cold leveling straightening device, which is composed of a straightening roller, a driving device 3, a pressing device 4, a rack 5 and a transmission shaft 6 as shown in figure 1; the straightening roller consists of a group of straightening concave rollers 1 and straightening convex rollers 2 with specific curvatures, and the straightening concave rollers 1 and the straightening convex rollers 2 are arranged in the middle of the frame in an up-down axisymmetric mode and are connected with the transmission shaft; the driving device 3 is arranged at the side edge of the straightening roller and connected with the transmission shaft, and is used for driving the straightening roller and adjusting the straightening speed of the straightening roller; the pressing devices 4 are arranged on two sides of the upper end of the frame and used for adjusting the roll gap spacing of the straightening rolls.
Furthermore, the straightening rollers can be composed of a plurality of groups of straightening concave rollers and straightening convex rollers, wherein each group of straightening concave rollers and each group of straightening convex rollers are distributed in an up-down axisymmetric mode and are in one-to-one correspondence, the plurality of groups of straightening concave rollers are horizontally arranged on the same side, and the plurality of groups of straightening convex rollers are horizontally arranged on the other side.
Further, according to the metalThe method comprises the steps of dividing a component metal material layer with a large thermal expansion coefficient into a base layer and dividing a component metal material layer with a small thermal expansion coefficient into a coating layer; the thermal expansion coefficient of the base layer is alpha 1 The thermal expansion coefficient of the coating is alpha 2 ，α 1 Greater than alpha 2 The method comprises the steps of carrying out a first treatment on the surface of the The total thickness of the metal laminated composite board is H.
Further, the straightening temperature of the metal layered composite board is T, and the application environment temperature is T 0 The difference between the straightening temperature and the application environment temperature is denoted by Δt, yielding Δt=t-T 0 The method comprises the steps of carrying out a first treatment on the surface of the The yield strength of the metal laminar composite board is sigma when the temperature is the straightening temperature T s The elastic modulus is E.
Further, the roll curve shape of the straightening roll is represented by the curvature K, the curvature k=2× (α 1 -α 2 )×ΔT/H+4×σ s /(E.times.H); and the roll gap distance of the straightening roll is H.
Further, according to the actual situation of the metal layered composite plate, the curvature of the straightening roller and the roll gap spacing of the straightening roller can be adjusted.
Further, the straightening concave roller and the straightening convex roller are axisymmetric, and the installation positions of the straightening concave roller and the straightening convex roller are interchangeable.
Furthermore, the hot bending and cold leveling equipment for the metal layered composite plate can be combined with at least one leveling equipment of a pressure leveling machine, a stretching leveling machine or a roller leveling machine.
Further, the straightening device can be used as a rolling device for simultaneously rolling plastic deformation and straightening processing.
The technical scheme of the invention also provides a hot bending and cold leveling straightening method for the metal layered composite board, which adopts the hot bending and cold leveling straightening equipment for the metal layered composite board to finish straightening, and comprises the following specific steps:
step 1: according to the practical application condition of the metal layered composite boardDetermining the application environment temperature T 0 Calculating the difference DeltaT=T-T between the straightening temperature T and the straightening temperature T 0 The method comprises the steps of carrying out a first treatment on the surface of the Determining the physical performance parameters of the metal laminated composite board, and determining the thermal expansion coefficient alpha of the base layer 1 Coefficient of thermal expansion alpha of the coating 2 The total thickness H; determining the yield strength sigma of the metal laminate composite plate at a temperature which is the straightening temperature T s Modulus of elasticity E;
step 2: calculating the curvature k=2× (α of the straightening roll 1 -α 2 )×ΔT/H+4×σ s /(E×H)；
Step 3: processing the straightening roller with the curvature of K;
step 4: the straightening rollers are installed, and the gap distance between the rollers is adjusted to be H through the pressing device;
step 5: starting the driving device and adjusting the straightening speed;
step 6: according to the hot bending and cold leveling process of the metal laminated composite board shown in fig. 2, the metal laminated composite board with the temperature T is subjected to hot bending deformation through the leveling roller with the curvature K, the coating faces the leveling convex roller in the deformation process, the base layer faces the leveling concave roller, and then the metal laminated composite board after hot bending deformation is cooled to the application environment temperature, so that the flat metal laminated composite board is obtained.
Example 1:
the pure titanium/Q235 steel layered composite board is subjected to hot bending, cold leveling and straightening processing, and the specific steps are as follows:
step 1: according to the actual application condition of the pure titanium/Q235 steel layered composite board, determining that the application environment temperature is 25 ℃ at room temperature and the straightening temperature is 650 ℃; determination of the total thickness of the pure titanium/Q235 Steel layered composite plate to be 0.002m, the thermal expansion coefficient of the Q235 steel was 12×10 -6 ℃ -1 The thermal expansion coefficient of pure titanium is 9×10 -6 ℃ -1 The method comprises the steps of carrying out a first treatment on the surface of the Determining that the yield strength of the pure titanium/Q235 steel layered composite board is 110MPa and the elastic modulus is 120000MPa at 650 ℃;
step 2: calculation of the curvature of the straightening roll to 3.7m -1 ；
Step 3: processed to have a curvature of 3.7m -1 Is a straightening roll;
step 4: the straightening roller is installed, and the roller gap spacing is adjusted to 0.002m through a pressing device;
step 5: starting a driving device, and adjusting the straightening speed to be 1m/s;
step 6: passing a pure titanium/Q235 steel layered composite board with a temperature of 650 ℃ through a steel plate with a curvature of 3.7m -1 The straightening roller is subjected to thermal bending deformation, the pure titanium side faces the convex roller in the deformation process, and the Q235 steel side faces the concave roller;
step 7: and (3) cooling the pure titanium/Q235 steel layered composite board subjected to thermal bending deformation to room temperature in an air cooling way, wherein a physical diagram of curvature of the pure titanium/Q235 steel layered composite board in the cooling process along with temperature change is shown in fig. 3, and the pure titanium/Q235 steel layered composite board bent at high temperature gradually reaches a straight state in the cooling process, so that the straight pure titanium/Q235 steel layered composite board is finally obtained.
Example 2:
the hot bending and cold leveling straightening process of the pure titanium/pure aluminum layered composite board comprises the following specific steps:
step 1: according to the actual application condition of the pure titanium/pure aluminum layered composite board, determining the application environment temperature to be 25 ℃ at room temperature and the straightening temperature to be 400 ℃; the total thickness of the pure titanium/pure aluminum layered composite plate is determined to be 0.003m, and the thermal expansion coefficient of pure aluminum is determined to be 24 multiplied by 10 -6 ℃ -1 The thermal expansion coefficient of pure titanium is 9×10 -6 ℃ -1 The method comprises the steps of carrying out a first treatment on the surface of the Determining that the yield strength of the pure titanium/pure aluminum layered composite board is 85MPa and the elastic modulus is 64000MPa at 400 ℃;
step 2: calculating the curvature of the straightening roll to be 5.5m -1 ；
Step 3: processed to have a curvature of 5.5m -1 Is a straightening roll;
step 4: the straightening rollers are installed, and the roller gap spacing is adjusted to be 0.003m through a pressing device;
step 5: starting a driving device, and adjusting the straightening speed to be 0.5m/s;
step 6: passing the pure titanium/pure aluminum layered composite board with the temperature of 400 ℃ through a curvature5.5m -1 The straightening roller is subjected to thermal bending deformation, the pure titanium side faces the convex roller in the deformation process, and the pure aluminum side faces the concave roller;
step 7: and cooling the pure titanium/pure aluminum layered composite board subjected to thermal bending deformation to room temperature in a water-cooling way to obtain the flat pure titanium/pure aluminum layered composite board.
Example 3:
AZ31 magnesium alloy/Q235 steel layered composite board hot bending, cold leveling and straightening processing, which comprises the following specific steps:
step 1: according to the actual application condition of the AZ31 magnesium alloy/Q235 steel layered composite board, determining that the application environment temperature is 25 ℃ at room temperature and the straightening temperature is 400 ℃; the total thickness of the AZ31 magnesium alloy/Q235 steel layered composite plate is determined to be 0.005m, and the thermal expansion coefficient of the AZ31 magnesium alloy is determined to be 27 multiplied by 10 -6 ℃ -1 Q235 steel has a thermal expansion coefficient of 12×10 -6 ℃ -1 The method comprises the steps of carrying out a first treatment on the surface of the Determining that the yield strength of the AZ31 magnesium alloy/Q235 steel layered composite plate is 90MPa and the elastic modulus is 100000MPa at 400 ℃;
step 2: calculating the curvature of the straightening roll to be 3.0m -1 ；
Step 3: processed to have a curvature of 3.0m -1 Is a straightening roll;
step 4: the straightening rollers are installed, and the roller gap spacing is adjusted to be 0.005m through a pressing device;
step 5: starting a driving device, and adjusting the straightening speed to be 0.8m/s;
step 6: passing the AZ31 magnesium alloy/Q235 steel laminated composite board with the temperature of 400 ℃ through a steel plate with the curvature of 3.0m -1 Carrying out hot bending deformation on the straightening roller, wherein the Q235 steel side faces towards the convex roller and the AZ31 magnesium alloy side faces towards the concave roller in the deformation process;
step 7: and cooling the AZ31 magnesium alloy/Q235 steel layered composite board subjected to thermal bending deformation to room temperature in an air cooling way to obtain the flat AZ31 magnesium alloy/Q235 steel layered composite board.
Comparative example 1:
and straightening the pure titanium/Q235 steel layered composite board by adopting a multi-roller straightener. The straightening temperature is 25 ℃ at room temperature, the room temperature straightening deformation resistance is high, and the coercive force requirement on equipment is high; in the multi-roller straightening process, repeated bending deformation is needed, the thinner the pure titanium/Q235 steel layered composite board is, the more the required straightening rollers are, the more the repeated bending deformation passes are, and the bonding quality of a composite interface can be damaged in the deformation process due to uncoordinated deformation of heterogeneous component metal materials in the pure titanium/Q235 steel layered composite board, and the cracking of the composite interface can be caused when the deformation is serious; when the bending deformation degree of the pure titanium/Q235 steel lamellar composite plate needing to be straightened is large, and particularly the deformation amplitude is far higher than the roll gap, the pure titanium/Q235 steel lamellar composite plate is difficult to be fed into a multi-roll straightener for straightening.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (10)
1. The hot bending and cold leveling straightening equipment for the metal layered composite plate is characterized by comprising a straightening roller, a driving device, a pressing device, a rack and a transmission shaft;
the straightening rollers comprise at least one group of straightening concave rollers and straightening convex rollers with specific curvatures, the straightening concave rollers and the straightening convex rollers are arranged in the middle of the frame, and the straightening concave rollers and the straightening convex rollers are connected with the transmission shaft;
the driving device is arranged on the side surface of the straightening roller and connected with the transmission shaft, and is used for driving the straightening roller and adjusting the straightening speed of the straightening roller;
the pressing device is arranged at the upper end of the frame and used for adjusting the roll gap spacing of the straightening roll.
2. The apparatus for straightening a metal laminate composite board by hot bending and cold leveling as claimed in claim 1, wherein the metal laminate composite board has a base layer of a component metal material layer having a large thermal expansion coefficient and a cladding layer of a component metal material layer having a small thermal expansion coefficient; the thermal expansion coefficient of the base layer is alpha 1 The thermal expansion coefficient of the coating is alpha 2 ，α 1 Greater than alpha 2 The method comprises the steps of carrying out a first treatment on the surface of the The total thickness of the metal laminated composite board is H.
3. The hot bending and cold leveling equipment for the metal laminated composite board according to claim 2, wherein the leveling temperature of the metal laminated composite board is T, and the application environment temperature is T 0 The difference between the straightening temperature and the application environment temperature is denoted by Δt, Δt=t-T 0 The method comprises the steps of carrying out a first treatment on the surface of the The yield strength of the metal laminar composite board is sigma when the temperature is the straightening temperature T s The elastic modulus is E.
4. A metal laminate composite board hot bending and cold straightening apparatus as claimed in claim 3, characterized in that the roll-shaped curve shape of the straightening roll is represented by the curvature K, the curvature k=2× (α 1 -α 2 )×ΔT/H+4×σ s /(E.times.H); and the roll gap distance of the straightening roll is H.
5. The apparatus for straightening a metal laminate composite board by hot bending and cold leveling according to claim 1, wherein said curvature and said gap spacing of said straightening rolls are adjusted according to the actual condition of said metal laminate composite board.
6. The hot bending and cold leveling device for the metal layered composite plate according to claim 1, wherein the leveling rollers are composed of a plurality of groups of leveling concave rollers and leveling convex rollers, each group of leveling concave rollers and leveling convex rollers are distributed in an up-down axisymmetric mode and are in one-to-one correspondence, the plurality of groups of leveling concave rollers are horizontally arranged on the same side, and the plurality of groups of leveling convex rollers are horizontally arranged on the other side.
7. The apparatus for straightening a metal laminate composite board by hot bending and cold leveling according to claim 1, wherein said straightening female roll and said straightening male roll are axisymmetric, and the installation positions of said straightening female roll and said straightening male roll are interchangeable.
8. The apparatus for straightening a metal laminate composite board by hot bending and cold leveling according to claim 1, wherein the apparatus for straightening a metal laminate composite board by hot bending and cold leveling is used in combination with at least one straightening apparatus selected from a press straightener, a stretch straightener and a roll straightener.
9. A metal laminate composite board hot bending and cold straightening apparatus according to claim 1, characterized in that the straightening apparatus is used as a rolling apparatus for rolling plastic deformation and straightening processing simultaneously.
10. The hot-bending and cold-leveling straightening method for the metal laminated composite board is characterized in that the hot-bending and cold-leveling straightening method for the metal laminated composite board adopts the hot-bending and cold-leveling straightening equipment for the metal laminated composite board according to any one of claims 1 to 9 to finish straightening, and comprises the following specific steps:
step 1: determining the application environment temperature T 0 Calculating the difference DeltaT=T-T between the straightening temperature T and the straightening temperature T 0 The method comprises the steps of carrying out a first treatment on the surface of the Determining the physical performance parameters of the metal laminated composite board, and the thermal expansion coefficient alpha of the base layer 1 Coefficient of thermal expansion alpha of the coating 2 The total thickness H; determining the yield strength sigma of the metal laminate composite plate at a temperature which is the straightening temperature T s Modulus of elasticity E;
step 2: calculating the curvature k=2× (α of the straightening roll 1 -α 2 )×ΔT/H+4×σ s /(E×H)；
Step 3: processing the straightening roller with the curvature of K;
step 4: the straightening rollers are installed, and the gap distance between the rollers is adjusted to be H through the pressing device;
step 5: starting the driving device and adjusting the straightening speed;
step 6: carrying out thermal bending deformation on the metal layered composite board with the temperature T through the straightening roller with the curvature K, wherein the coating faces the straightening convex roller in the deformation process, and the base layer faces the straightening concave roller;
step 7: and cooling the metal laminated composite board after the thermal bending deformation to the application environment temperature to obtain the flat metal laminated composite board.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311498880.5A CN117505591A (en) | 2023-11-10 | 2023-11-10 | Hot bending and cold leveling straightening equipment and method for metal layered composite board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311498880.5A CN117505591A (en) | 2023-11-10 | 2023-11-10 | Hot bending and cold leveling straightening equipment and method for metal layered composite board |
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| Publication Number | Publication Date |
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| CN117505591A true CN117505591A (en) | 2024-02-06 |
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|---|---|---|---|
| CN202311498880.5A Pending CN117505591A (en) | 2023-11-10 | 2023-11-10 | Hot bending and cold leveling straightening equipment and method for metal layered composite board |
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| Country | Link |
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| CN (1) | CN117505591A (en) |
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